Matcher-head.



L. O. KENDALL.

- MATOHEB. HEAD.

APPLICATION FILED 11110.14, 1911.

Patented June 9,1914.

2 SHEETS-MEET 1.

COLUMBIA PLANOQRAPH Cm, WASHINGTON. D. 0.

L. G. KENDALL.

MATOHEB. HEAD. APPLICATION FILED DEG. 14,1911.

1,099,880, I Patented June 9, 1914.

2 SHEETS-SHEET 2. A V

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COLUMBIA PLANOGRAPH 120.. WASHINGTON; nsu

UNITED STATES PATENT onFroE.

LEMUEL C. KENDALL, 0F MALDEN, MASSACHUSETTS, ASSIGNOR T0 S. A. WOODS MACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

MATCHER-HEAD.

To all whom it may concern:

Be it known that I, LEMUEL C. KENDALL, a citizen of the United States, and resident of Malden, county of Middlesex, State of Massachusetts, have invented an Improvement in Matcher-Heads, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to rotary cutter heads of a type having two sets of cutters, one set adapted to serve as main surface cutters and the other set projecting farther out to make a deeper cut or groove in a portion of the surface being operated on.

While having various other and more general fields of usefulness, the invention is well adapted for use in dressing the edges of matched stock to form true matching edges and the central groove to receive the tongue of the ordinary tongue-and-groove matching. For this use it is essential that the main surface cutters, which in this case constitute the jointing cutters for producing the matching edges, should be perfectly true and accurate while the other or projecting cutters which produce the groove do not need to be so accurately adjusted.

A principal object of my invention is to provide a single unitary cutter head, holding both the main surface or jointing set of cutters and the projecting or grooving set, having provision to permit the initial adjustment of the set of main surface or jointing cutters therein, and to reliably and securely hold this set of cutters in such adjustment against rigid backings, preferably formed by substantial portions of the stock of the head. In connection with this construction, the invention provides means whereby the grooving cutters may be quickly and easily removed so as to permit the application of a truing appliance for truing the edges of the main surface cutters while the cutter head is driven at high speed. I

A further feature of the invention relates to an improved construction and mounting of the grooving cutters whereby they are individually held in adjustable holders preferably with a wedging engagement, so that each cutter with its holder may be takenout Specification of Letters Patent.

Application filedDecember 14, 1911.

Patented June 9, 1914. Serial No. 665,595.

of the head and put back in place as determined by the engagement of the holder with a suitable backing without disturbing the adjustment of the cutter in its holder.

A further'feature of the invention relates to a novel form of tapered cutter in combination with its holder and the head whereby it has a proper clearance and preferably is adapted for tight wedging engagement into its holding block, the parts being arranged so that a single gripping means is adapted to clamp the cutter-holding block and cutter in place and to grip the block on to the cutter.

A still further feature of improvement has to do with means for quickly and easily adjusting the grooving cutters angularly and alternate ones in opposite directions so as to make grooving cuts of different widths or to account for wear.

The above and other features of the invention will be better understood from the following detailed description, taken in connection with the accompanying drawings wherein a preferred illustrative embodiment of the invention is shown, and will be thereafter pointed out in the appended claims.

Referring to thedrawings, Figure 1 is an end elevation of my improved cutter head. Fig. 2 is a side view thereof with parts broken away in section. Fig. 3 is a detail view showing the cutter head in section on line 3-3 of Fig. 1. Fig. 4: is a fragmentary sectional detail showing the manner of angular adjustment of the grooving cutters. Fig. 5 is a similar view in elevation showing the manner of clamping the grooving cutters in place, and Fig. 6 is a diagrammatic view showing the operative relation of the grooving cutters to the work.

The cutter head is shown as a short cylindrical section 1 of preferably integral stock fixed to a suitable driving shaft or sleeve 2 by any usual clamping means 3. This head is recessed at regular intervals, shown as four, about its periphery to provide seats 4 for the main surface or jointing cutters 5. These seats hold the cutters at a considerable forward inclination, as shown, and the backing surfaces 6 thereof are provided with serrations or teeth extending length- Wise of the head, adapted for interengagement with like serrations 7 on the cutters, so that as these serrations are pressed into interengagement, by clamping blocks 8 forced against the cutters from the other side by adjusting screws 9, the cutters are firmly and immovably held in their seats. It is to be observed that the special formation ofthese seats so as to have a width substantially the same as that of the cutters in the solid body of the stock of the head provides a relatively thick and substantial mass of the integral material of the head as a backing for the cutters, as seen at 10, so that as the cutters are clamped thereagainst they are'securely and immovably held with a perfectly rigid backing up very close to their cutting edges 11. The adjusting blocks 8 may be held against casual displacement by having projecting tongues pivoted in the cutter head, as seen at 12. With the jointingcutters thus secured in the head, they may be trued down by rotation of the cutter head in contact with the truing device, and after being so trued the cutters are adapted for relatively long periods of use without adjustment. The cutter head is provided intermediate the jointing cutter recesses with another series of recesses formed, as shown, of cylindrical borings l3 likewise forwardlyinclined and'adapted to have fitted therein the cylindrical holder blocks 14 for the grooving cutters. The holder blocks 14 are adapted to be set easily into place in their seats formed by the borings 13 With their ends abutting against stops 15, which determine the seating position of the holders, and they are adapted to be clamped in this position by screw bolts 16 threaded through the head and pressing transversely thereagainst. The holder blocks 14 are slotted throughout their length, as seen at 17, to receive the cutters 18, the outer portions of the walls of these slots diverging, as seen at 19, to fit the taper of the cutters. As shown, the slots 17 extend well through the blocks 14 so that the sides 19 which embrace the cutters have some little spring action and the wedge shaped cutters may be readily pushed into their seats so as to be held by the friction grip of the holders against casual displacement. This tapering form of the cutters is also advantageous in that it insures a proper clearance for the cutters throughout the range of angular adjustment thereof, as later explained. To effect this angular ustment or turning of the cutters to permit grooving cuts of different widths to be made, the holder blocks 14 have one or more teeth 20 formed along the sides thereof and adapted to be engaged by circular ribs or teeth 21 formed on screw bolts 22 passing lengthwise through the cutter heads and in threaded engagement therewith at one end, as seen at 23, the other ends of these bolts having a sliding fit in bores in the head as at 24, and shown as provided with kerfs 25 to receive a screwdriver, this typifying any suitable provision for engagement by a tool to turn these bolts. The threads 23 on the adjusting bolts 22 are alternately right and left hand threads, and hence turning the successive bolts in the same direction causes the successive grooving cutters to rock or swing in opposite directions, as required, from or toward the opposite sides to cut narrower or wider grooves, as desired and to take up for wear of the cutters. A further advantage of the tapered form of the cutters (see Fig. 6) is that it insures a proper clea 'ance through a wider range of angular movement than would otherwise be the case.

As previously stated, the walls of the slots 17 in the holding blocks have some little spring capacity to grip the cutters as they are pressed therein to hold these parts assembled while the blocks are taken out, and this springing capacity is further made use of to pinch or grip the cutters firmly and securely in their blocks as the screw bolts 16 are adjusted to place, these bolts not only clamping the holding blocks in their sockets, but also springing their sides down strongly against the cutters.

While the blocks 14 are formed so as to be easily slidable in and out of their sockets, I provide means whereby, in case they do not come out easily, a tool may be inserted to force them out, and to this end holes 26 are formed through the head opening into the bores 13 at the ends of the blocks as they are seated against the stops 15 so that a tool inserted therethrough may be engaged against the end of the block and used as a lever to dislodge the block and its cutter.

It is thus to be seen that the. set of grooving cutters may be quickly removed when desired for sharpening or truing the jointing cutters by merely loosening the several clamp bolts 16 and pulling the blocks 14 out with the cutters left in place thereon. Likewise the set of grooving cutters may be easily replaced as their position eudwise is determined by the stops 15 and their angular position by the teeth 21 on the bolts 22. I consider this coi'istruction of the cylindrical blocks 14 with their angular adjusting means consisting of the screwbolts 22 and ribs 21 to be an important and advantageous feature of the invention, since it provides means which does not interfere with the removal of the holders, insures their being replaced in proper position and provides for a ready and exact angular adjustment thereof.

The described provisions for the easy and quick removal and replacing of the set of grooving cutters in operative position without requiring adjustments or special maniplllatloh, make it practicable to mount this set of cutters on the same unitary head with the set of jointing cutters, as the jointing cutters can thus be trued and sharpened in the usual manner with the cutter head'moving at full speed, and I therefore desire to cover broadly the construction making possible this advantageous result in distinction from previous forms wherein separate head portionswere required for each set of cutters, these portions requiring to be assembled and taken apart when the jointing cutters were to be dressed or used alone.

I am aware that various of the details of construction can be considerably modified without departing from the spirit of the invention, and I therefore do not desire to be limited as to these, or in other particulars except as set forth in the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A cutter head having a set of holders removably set lengthwise into its periphery, a set of grooving cutters mounted lengthwise in said holders to project from the ends of the latter, said holders having cutter-clamping walls formed by a slot lengthwise of each holder, and clamping means cooperating with said holders and head for simultaneously clamping a holder in the head and the cutter in the holder.

2. A cutter head, having a set of holders removably set lengthwise into its periphery, a set of cutters mounted lengthwise in said holders to project from the ends of the latter and having a length to extend within the head for support thereby, said holders being slotted lengthwise on one side only to form clamping sockets for the cutters along one side of each holder, said cutters being adjustable lengthwise in said holders, and said holders and cutters being together angularly adjustable in said head.

3. A cutter head, having a series of holders set endwise in the periphery of said head and terminating approximately flush with said periphery, said holders being loosely mounted for endwise removal, and said head having means within the sockets which contain the holders for stopping all of said holders in like positions with relation to said periphery, a cutter extending within the head and mounted lengthwise of said holder and eccentrically thereof and adjustable lengthwise in said holder, and means for rotating the holder and its cutter to vary the line of cut of one cutter with relation to another.

4. A cutter head, having a series of cutter holders set endwise into its periphery, each holder having a lengthwise groove with flaring walls, and cutters tapered in cross section to fit lengthwise into said grooves with a wedging fit for adjustment lengthwise of the holders, and means carried by the head for clamping the holders in the head and thereby clamping the cutters in the holders.

5. A cutter head, having a series of holder receiving seats circular in cross section and extending inwardly from the periphery lengthwise in a plane substantially at right angles to the axis of revolution, a series of holders loosely mounted in said seats and having a corresponding circular cross section, a cutter removably mounted in each holder to extend also within the seat and a toothed adjusting device having toothed engagement with each holder for rotating the holder and cutter in its seat.

6. A cutter head having a set of grooving cutters mounted in individual holders socketed in the head, said holders being circular in cross section, and an adjusting screw bolt for each holder having toothed engagement therewith for angularly adjusting the respective tools.

7. A cutter head having a set of grooving cutters carried by individual holders socketed in the head, said holders being circular in cross section, and a series of adjusting screw bolts mounted lengthwise of the head transversely for toothed interengagement with the respective holders, said screw bolts having alternately right and left hand threaded engagement with the head, so that upon being turned in the same direction alternate cutters are adjusted in opposite directions.

8. A matcher head, comprising a set of inain surface cutters, means for holding said cutters in permanent adjustment in said head, said head having an integral thickness substantially the same as the width of the cutters and affording the latter a strong backing substantially coextensive with the width of the cutters, and a set of circular seats located intermediate said cutters and extending lengthwise inwardly from the periphery in approximately one and the same plane at substantially right angles to the axis of rotation, holders occupying said seats, each holder corresponding in shape to said seat and loosely mounted therein for endwise and rotary movement, and having a longitudinal slot opening at one side only for receiving a cutter, grooving cutters for said slots and lengthwise adjustable therein, and means for rotating said holders and cutters.

9. A cutter head having a set of circular seats opening outward in its periphery, a set of holders loosely mounted in said seats and terminating at one end substantially at the periphery, each holder having a lengthwise groove within the seat, a set of cutters carried eccentrically by said holders and clamped in said grooves in position to pro ject lengthwise of and beyond said holders and periphery, and adjusting means for r0- tating said holders and cutters.

10. A cutterhead, having aset of circular seats extending inwardly toward the center of the head from the periphery thereof into the integral metal of the head, a set of hold ers movable lengthwise and rotatably in said seats, each holder having a longitudinal groove extending thereinto from one side only, a cutter removably fitting said groove in position to be embraced by the holder and also by the head when the holder and the cutter are slid within said head into said seat, said head having an opening extending transversely into said seat in position to receive an ejecting tool behind the holder, when the latter is in operative position, for pushing the holder and cutter outward from said seat.

11. A cutterhead, having a set of circular bores into the solid body of the head to constitute seats extending from the periphery inwardly in a general direction toward the center of the head, a corresponding series of cylindrical holders having substantially the same diameter from end to end as said bores, said cylindrical holders being longitudinally grooved from end to end to constitute a substantially U shape in cross section, and a cutter for each holder adapted to be gripped by the latter within said groove, and clamping means arranged to cooperate with all the aforesaid parts to grip the cutters and holders in desired adjustment within the head.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

LEMUEL C. KENDALL.

lVitnesses CHAS. H. BLooi), CARL G. OSTEMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

